books.google.co.uk - This book is an attempt to give a systematic presentation of both logic and type theory from a categorical perspective, using the unifying concept of fibred category. Its intended audience consists of logicians, type theorists, category theorists and (theoretical) computer scientists....https://books.google.co.uk/books/about/Categorical_Logic_and_Type_Theory.html?id=f4_Bd3Y8ZEcC&utm_source=gb-gplus-shareCategorical Logic and Type Theory